Has anyone had any experience with Halifaxonline.co.nz?

They have a white label partnership with Interactive Brokers so have access to lots of international markets - I am looking to invest mainly in US focused ETFs.

Halifax's commissions are low and they confirm they have no other fees (no inactivity, no account minimum, no exit etc) - their conversion exchange rate is the spot + 1%

I've thought about going directly to a US broker such as TD Ameritrade and completing the W8-BEN form etc, but it feels easier to have a broker located in NZ. Also they tell me that the NZ FMA expressly disallow overseas brokers from opening accounts to NZers and they've seen a lot of new business because of this.